Add new website: folders OK but still "shared IP" notice

I reinstalled Debian 4.0 through the perfect setup yesterday, everything was fine, added about 26 websites, all fine.
But when I add another website now as admin but for one of my reseller accounts it does make the domain, it does make the /var/www/webXX/ folder but it still gives a shared IP when I type in the address, even after uploading files.

The site does *not* appear in /etc/apache2/vhosts/Vhosts_ispconfig.conf nor in one of the backup files. But before (the other 26 sites) it did...

I already tried to comment out some of the virtual host things as in one of the howtos here on the site but it didn't help.
And now I cannot add any sites, or I have to manually edit the /etc/apache2/vhosts/Vhosts_ispconfig.conf-file every time...